Laying hen breeding feed crushing device

Abstract

The invention is suitable for the technical field of feed crushing, and provides a laying hen breeding feed crushing device which comprises a conical material receiving base, a cylinder body, a material guiding draught hood, a shearing cylinder, a crushing structure and a conical screening hopper. The first cutter set and the second cutter set on the rotating shaft are driven by the motor to conduct two-stage smashing treatment on the feed, and the smashing efficiency and the feed particle size uniformity are improved. And a second cutter group in the crushing structure adopts crushing cutters arranged in a rhombus shape, so that the space of a crushing cavity is fully utilized. Multi-stage screening is achieved through the conical screening hopper and the multiple layers of screens, and qualified materials and fine materials are effectively separated. And dust pollution is reduced through the design of the material guide draught hood and the annular filter screen, and health of operators is protected. The buffering rod piece improves the screening efficiency and avoids blocking. The device has the advantages of high crushing efficiency, uniform feed granularity, good screening effect, reduction of dust pollution and the like, and is suitable for high requirements of modern laying hen breeding on feed quality.

Description

Technical Field

[0001] The invention relates to the technical field of feed crushing, and more specifically, to a feed crushing device for laying hens. Background Art

[0002] In the laying hen farming industry, the quality of feed has a vital impact on the growth and egg-laying efficiency of laying hens. Traditional feed crushing devices often have problems such as low crushing efficiency, serious dust pollution, and poor screening effect, which cannot meet the high requirements of modern laying hen farming for feed quality.

[0003] Traditional feed crushing devices usually use a single crushing mechanism, which results in unsatisfactory crushing effect and uneven feed particle size, which affects the digestion and absorption of laying hens. At the same time, since the dust generated during the crushing process cannot be effectively controlled, it will not only cause environmental pollution, but also pose a threat to the health of operators. In addition, the traditional screening mechanism is unreasonable in design, the screening efficiency is low, and it is impossible to effectively separate qualified materials from fine materials, which further affects the quality of feed. Summary of the invention

[0004] In view of the deficiencies in the prior art, the object of the present invention is to provide a feed crushing device for laying hen breeding.

[0005] In order to solve the above technical problems, the present invention is achieved through the following technical solutions: The present invention discloses a feed crushing device for laying hens, comprising a conical material receiving base and a cylinder body installed on the top of the conical material guiding base, a material guiding exhaust hood being fixed on the top of the cylinder body by bolts, a shearing cylinder and a crushing structure being installed in sequence from top to bottom inside the cylinder body, a motor being installed on the inner bottom of the cylinder body by a support frame, a conical screening bucket extending to the conical material receiving base being fixed on the bottom of the cylinder body, a buffer rod having a telescopic end in contact with the inner surface of the conical screening bucket being hinged on the bottom of the support frame, a rotating shaft penetrating the crushing structure and the shearing cylinder from bottom to top and extending to the inside of the shearing cylinder being fixed on the output shaft end of the motor, and a first knife group being installed on a section of the outer circumferential surface of the rotating shaft located inside the shearing cylinder.

[0006] The crushing structure includes an upper conical support sleeve and a lower conical support sleeve penetrated by a rotating shaft, the upper conical support sleeve and the lower conical support sleeve are fixed together by bolts to form a crushing chamber, the crushing chamber is installed inside the cylinder body by bolts, the top of the upper conical support sleeve is fixedly connected to the shearing cylinder by bolts, the shearing cylinder is connected with the inner cavity of the crushing chamber through the opening at the top of the upper conical support sleeve, a plurality of discharge windows connected with the inner cavity of the crushing chamber are opened on the conical surface of the lower conical support sleeve, a first screen is installed in each of the discharge windows, a second knife group with a diamond-shaped vertical cross-section is installed on the outer circular surface of one end of the rotating shaft located inside the crushing chamber, and a crushing gap is left between the second knife group and the inner wall of the crushing chamber.

[0007] The second tool assembly is composed of an upper conical fixing sleeve and a lower conical fixing sleeve fixed on the rotating shaft, and the upper conical fixing sleeve and the lower conical fixing sleeve are fixed by bolts to form a tool sleeve cavity, and a support plate is fixed on a section of the outer circumferential surface of the rotating shaft located inside the tool sleeve cavity, and the lower conical fixing sleeve is tightly attached). Conical tool pressing sleeves that respectively cooperate with the upper conical fixing sleeve and the lower conical fixing sleeve are fixed on the top and bottom of the support plate, and a plurality of crushing knives are penetrated through the upper conical fixing sleeve and the lower conical fixing sleeve along the generatrix of the conical surface, and one end of the plurality of crushing knives located inside the tool sleeve cavity is in contact with the outer circumferential surface of the conical tool pressing sleeve.

[0008] As a preferred technical solution of the present invention, a fine material discharge pipe connected to the inner cavity of the conical material receiving base is fixed at the bottom of the conical material receiving base, and a qualified material discharge pipe connected to the inner cavity of the conical screening bucket is fixed at the bottom of the conical screening bucket, and the discharge end of the qualified material discharge pipe passes through the fine material discharge pipe and extends to the outside of the fine material discharge pipe.

[0009] As a preferred technical solution of the present invention, a load-bearing plate is fixed on the top of the cylinder body, a mounting hole cooperating with the shearing cylinder is provided on the load-bearing plate, a plurality of exhaust holes cooperating with the material guide exhaust hood are equidistantly provided in a ring shape around the mounting hole on the load-bearing plate, an annular filter is installed in the exhaust hole, two mounting grooves penetrating through the cylinder body are provided on the cylinder body, an observation glass window is installed in the mounting groove.

[0010] As a preferred technical solution of the present invention, the material guiding exhaust hood includes a material guiding hopper fixedly connected and communicated with the shearing cylinder by bolts, an annular exhaust hood covering a plurality of exhaust holes is fixed on the outer circular surface of the bottom of the material guiding hopper, and an exhaust pipe connected to the inner cavity of the annular exhaust hood is installed along the tangential direction on the outer circular surface of the annular exhaust hood.

[0011] As a preferred technical solution of the present invention, the shearing cylinder is composed of a straight cylinder portion at the top and a conical portion at the bottom, the first knife group is installed in the straight cylinder portion at the top of the shearing cylinder, the conical portion at the bottom of the shearing cylinder is fixedly connected to the upper conical support sleeve by bolts, a vertical discharge window is opened on the cylinder wall of the straight cylinder portion at the top of the shearing cylinder, a fan-shaped discharge window is opened on the cylinder wall of the conical portion at the bottom of the shearing cylinder, a vertical screen is installed in the vertical discharge window, and a fan-shaped screen is installed in the fan-shaped discharge window.

[0012] As a preferred technical solution of the present invention, the buffer rod comprises a spring sleeve hinged to a support frame, an end cover is fixed to one end of the spring sleeve away from the support frame, a spring is installed in the spring sleeve, a guide rod passes through the end cover, one end of the guide rod located inside the spring sleeve is pressed against the spring, and a roller in contact with the inner surface of the conical screening bucket is installed at the other end of the guide rod.

[0013] As a preferred technical solution of the present invention, the first knife group includes a fixed sleeve arranged on the rotating shaft, and a plurality of shear knives are installed on the outer circumferential surface of the fixed sleeve.

[0014] As a preferred technical solution of the present invention, the vertical screen, the fan-shaped screen and the first screen have the same mesh aperture size, and the mesh aperture size of the vertical screen, the fan-shaped screen and the first screen is larger than the mesh aperture size of the conical screening bucket.

[0015] As a preferred technical solution of the present invention, the crushing knife includes a knife rod and a mounting plate, the knife rod is fixedly connected to the mounting plate, the knife rod passes through an upper conical fixing sleeve and a lower conical fixing sleeve, and a knife groove matching the knife rod is provided on the upper conical fixing sleeve and the lower conical fixing sleeve, and the mounting plate is fan-shaped, and a surface of the mounting plate on which the knife rod is mounted is respectively fitted with the inner surface of the upper conical fixing sleeve and the inner surface of the lower conical fixing sleeve, and the other surface of the mounting plate is fitted with the outer surface of the conical knife pressing sleeve.

[0016] The advantages of the present invention are: 1. The present invention realizes two-stage crushing of feed by setting a shearing cylinder and a crushing structure, effectively improving the crushing efficiency, making the feed particle size more uniform, and facilitating the digestion and absorption of laying hens. The second knife group in the crushing structure adopts a diamond-shaped crushing knife, which can make fuller use of the space of the crushing cavity and further improve the crushing effect.

[0017] 2. The design of the conical screening bucket and multi-layer screen of the present invention realizes multi-level screening of the crushed feed, effectively separates qualified materials and fine materials, and improves the quality of the feed. The aperture design of the screen is reasonable, ensuring the dual improvement of screening efficiency and screening quality.

[0018] 3. The design of the material guide exhaust hood and the annular filter screen of the present invention can effectively absorb and filter the dust generated during the crushing process, reduce environmental pollution, and protect the health of operators. The load-bearing plate and exhaust holes on the top of the cylinder further enhance the dust removal effect and ensure a clean working environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The present invention is a schematic structural diagram of a feed crushing device for laying hens.

[0020] Figure 2 It is a structural schematic diagram of another viewing angle of the present invention.

[0021] Figure 3 It is a schematic diagram of the cross-sectional structure of the present invention.

[0022] Figure 4 It is a schematic diagram of the structure in which the shearing cylinder, crushing structure, support frame, motor and conical screening bucket cooperate with each other.

[0023] Figure 5 Schematic diagram of the crushing structure.

[0024] Figure 6 This is a structural schematic diagram of the crushing structure from another perspective.

[0025] Figure 7 Schematic diagram of the cross-section structure of the crushed structure.

[0026] Figure 8 It is a schematic diagram of the structure of the second knife group.

[0027] Fig. 9 This is a schematic diagram of the structure of the second knife group from another perspective.

[0028] Fig.10 It is a schematic diagram of the cross-sectional structure of the second knife group.

[0029] Fig.11 It is a structural schematic diagram of the material guide exhaust hood.

[0030] Fig.12 Schematic diagram of the structure of the shear cylinder.

[0031] Fig.13 It is a schematic diagram of the structure of the cylinder.

[0032] Fig.14 It is a schematic diagram of the structure of the support plate and the conical pressure cutter sleeve.

[0033] Fig.15 It is a schematic diagram of the structure of a crushing knife.

[0034] Fig.16 It is a schematic diagram of the structure in which the upper conical support sleeve, the lower conical support sleeve and the first screen cooperate with each other.

[0035] In the attached drawings: 1. Conical receiving base; 2. Cylinder; 201. Load-bearing plate; 202. Mounting hole; 203. Annular filter screen; 204. Observation glass window; 3. Material guide exhaust hood; 301. Material guide hopper; 302. Annular exhaust hood; 303. Exhaust pipe; 4. Shearing cylinder; 401. Straight cylinder; 402. Conical part; 403. Vertical screen; 404. Fan-shaped screen; 5. Crushing structure; 501. Upper conical support sleeve; 502. Lower conical support sleeve; 503. First screen; 504, second knife group; 5041, upper conical fixing sleeve; 5042, lower conical fixing sleeve; 5043, supporting plate; 5044, conical knife pressing sleeve; 5045, crushing knife; 6. Support frame; 7. Motor; 8. Conical screening bucket; 9. Buffer rod; 10. Rotating shaft; 11. First knife group; 12. Fine material discharge pipe; 13. Qualified material discharge pipe. DETAILED DESCRIPTION

[0036] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention. The present invention is described in more detail by way of example with reference to the accompanying drawings in the following paragraphs. It should be noted that the accompanying drawings are all in a very simplified form and are not in precise proportions, and are only used to facilitate and clearly assist in explaining the purpose of the embodiments of the present invention.

[0037] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a component centered. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may also be a component centered. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a component centered. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0039] Example 1: Please refer to Figure 1-16 Structural schematic diagram, the present invention provides the following technical solutions: Specifically, it refers to a laying hen feed crushing device, including a conical material receiving base 1 and a cylinder 2 installed on the top of the conical material receiving base 1, a material guiding and exhaust hood 3 is fixed to the top of the cylinder 2 by bolts (the design of the material guiding and exhaust hood 3 helps to reduce dust pollution), a shearing cylinder 4 and a crushing structure 5 connected from top to bottom are installed in sequence inside the cylinder 2, a motor 7 is installed at the bottom of the cylinder 2 through a support frame 6, a conical screening bucket 8 extending to the conical material receiving base 1 is fixed at the bottom of the cylinder 2, a rotating shaft 10 is fixed to the output shaft end of the motor 7, and the rotating shaft 10 passes through the crushing structure 5 and the shearing cylinder 4 from bottom to top and extends to the inside of the shearing cylinder 4, and a first knife group 11 is installed on a section of the outer cylindrical surface of the rotating shaft 10 located inside the shearing cylinder 4. When in use, the feed to be crushed is added through the material guide exhaust hood 3, and the feed enters the shearing cylinder 4. The motor 7 drives the first knife group 11 to rotate at high speed through the rotating shaft 10, and the feed is preliminarily sheared and crushed in the shearing cylinder 4. The smaller feed that meets the standards falls into the conical screening bucket 8 through the shearing cylinder 4. The remaining feed enters the crushing structure 5 after preliminary shearing, and is further completely crushed by the crushing structure 5. After the crushed feed is screened by the conical screening bucket 8, the qualified ones are discharged through the conical screening bucket 8, and the unqualified, i.e. smaller raw materials, fall into the material guide exhaust hood 3 through the conical screening bucket 8 and are finally discharged in a centralized manner.

[0040] The first knife assembly 11 includes a fixed sleeve mounted on the rotating shaft 10 , and a plurality of shearing knives are mounted on the outer circumferential surface of the fixed sleeve, so as to facilitate the installation of the first knife assembly 11 on the rotating shaft 10 .

[0041] A fine material discharge pipe 12 communicating with the inner cavity of the conical material receiving base 1 is fixed at the bottom of the conical material receiving base 1, and a qualified material discharge pipe 13 communicating with the inner cavity of the conical screening bucket 8 is fixed at the bottom of the conical screening bucket 8, and the discharge end of the qualified material discharge pipe 13 penetrates the fine material discharge pipe 12 and extends to the outside of the fine material discharge pipe 12. The qualified material discharge pipe 13 is used to discharge qualified feed intercepted by the conical screening bucket 8, and the fine material discharge pipe 12 is used to discharge fine fine materials passing through the conical screening bucket 8.

[0042] A load-bearing plate 201 is fixed on the top of the cylinder 2, and a mounting hole 202 cooperating with the shearing cylinder 4 is opened on the load-bearing plate 201. A plurality of exhaust holes cooperating with the material guide exhaust hood 3 are opened in a circular shape and equidistantly around the mounting hole 202 on the load-bearing plate 201. An annular filter screen 203 is installed in the exhaust hole. The annular filter screen 203 is used to filter feed dust circulated with the air flow. Two sections of mounting grooves penetrating the cylinder 2 are opened on the cylinder 2, and an observation glass window 204 is installed in the mounting groove.

[0043] The shearing cylinder 4 is composed of a straight cylinder portion 401 at the top and a conical portion 402 at the bottom. The first knife group 11 is installed in the straight cylinder portion 401 at the top of the shearing cylinder 4. The conical portion 402 at the bottom of the shearing cylinder 4 is fixedly connected to the upper conical support sleeve 501 by bolts. A vertical discharge window is opened on the cylinder wall of the straight cylinder portion 401 at the top of the shearing cylinder 4, and a fan-shaped discharge window is opened on the cylinder wall of the conical portion 402 at the bottom of the shearing cylinder 4. A vertical screen 403 is installed in the vertical discharge window, and a fan-shaped screen 404 is installed in the fan-shaped discharge window. The vertical screen 403 and the fan-shaped screen 404 have the same mesh aperture size, and the mesh aperture size of the vertical screen 403 and the fan-shaped screen 404 is larger than the mesh aperture size of the conical screening bucket 8. The shearing knife in the first knife group 11 in the shearing cylinder 4 shears the raw materials entering through the material guide exhaust hood 3. During the shearing and crushing process, qualified feed passes through the vertical screen 403 and the fan-shaped screen 404 and falls into the conical screening bucket 8 (the screening structure ensures that the feed particle size is uniform and meets the needs of laying hen breeding). The qualified feed screened by the conical screening bucket 8 is discharged through the qualified material discharge pipe 13, and the unqualified feed passes through the conical screening bucket 8 and is discharged from the fine material discharge pipe 12. The combination of preliminary shearing and crushing improves the feed crushing efficiency.

[0044] Embodiment 2: Based on the specific embodiment 1, the difference of this embodiment is that: like Figure 1-10 As shown, the crushing structure 5 includes an upper conical support sleeve 501 and a lower conical support sleeve 502 penetrated by the rotating shaft 10, the upper conical support sleeve 501 and the lower conical support sleeve 502 are fixed together by bolts to form a crushing chamber, the crushing chamber is installed inside the cylinder 2 by bolts, the top of the upper conical support sleeve 501 is fixedly connected to the shearing cylinder 4 by bolts, the shearing cylinder 4 is connected with the inner cavity of the crushing chamber through the opening at the top of the upper conical support sleeve 501, and a plurality of discharge windows connected with the inner cavity of the crushing chamber are provided on the conical surface of the lower conical support sleeve 502, and a first screen 503 is installed in each of the plurality of discharge windows, the first screen 503 has the same mesh aperture size as the vertical screen 403 and the fan-shaped screen 404, and the mesh aperture size of the first screen 503 is larger than the mesh aperture size of the conical screening bucket 8, and a second knife group 504 with a rhombus-shaped vertical cross section is installed on the outer circular surface of one end of the rotating shaft 10 located inside the crushing chamber, and a crushing gap is left between the second knife group 504 and the inner wall of the crushing chamber.

[0045] The second knife group 504 is composed of an upper conical fixing sleeve 5041 and a lower conical fixing sleeve 5042 fixed on the rotating shaft 10. The upper conical fixing sleeve 5041 and the lower conical fixing sleeve 5042 are fixed by bolts to form a knife sleeve cavity. A support plate 5043 is fixed on a section of the outer cylindrical surface of the rotating shaft 10 located inside the knife sleeve cavity. The outer cylindrical surface of the support plate 5043 is in close contact with the upper conical fixing sleeve 5041 and the lower conical fixing sleeve 5042. Conical knife pressing sleeves 5044 respectively matched with the upper conical fixing sleeve 5041 and the lower conical fixing sleeve 5042 are fixed on the top and bottom of the support plate 5043. A plurality of crushing knives 5045 are penetrated through the upper conical fixing sleeve 5041 and the lower conical fixing sleeve 5042 along the generatrix of the conical surface. The ends of the plurality of crushing knives 5045 located inside the knife sleeve cavity are in contact with the outer cylindrical surface of the conical knife pressing sleeve 5044.

[0046] The upper conical support sleeve 501 and the lower conical support sleeve 502 together form a conical crushing chamber, and the overall conical design of the second knife group 504 matches the crushing chamber, forming a narrow and long diamond-shaped crushing space (this diamond-shaped design improves the crushing efficiency and quality of the feed). Such a design ensures that the feed has enough space and time to be crushed in the crushing chamber, thereby ensuring the crushing efficiency of the device.

[0047] The crushing knife 5045 includes a knife bar and a mounting plate, the knife bar is fixedly connected to the mounting plate, the knife bar passes through the upper conical fixing sleeve 5041 and the lower conical fixing sleeve 5042, the upper conical fixing sleeve 5041 and the lower conical fixing sleeve 5042 are provided with knife grooves matching with the knife bar, the mounting plate is fan-shaped, one surface of the mounting plate with the knife bar mounted is respectively fitted with the inner surface of the upper conical fixing sleeve 5041 and the inner surface of the lower conical fixing sleeve 5042, and the other surface of the mounting plate is fitted with the outer surface of the conical pressure knife sleeve 5044, and the crushing knife 5045 is installed and fixed by the inner surface of the upper conical fixing sleeve 5041, the lower conical fixing sleeve 5042 and the conical pressure knife sleeve 5044, so as to ensure the firmness when crushing the feed. The crushing knife 5045 is set individually and can be replaced after a single one is damaged, so as to reduce the maintenance and use costs and extend the service life of the crushing device.

[0048] The crushing structure 5 is composed of the above-mentioned structures and is installed in the cylinder 2. When in use, it can not only crush the feed efficiently, but also ensure the quality of the feed crushing by the device. In addition, since the various components are assembled, the various components can be replaced during use, which can extend the service life of the device and reduce maintenance and use costs.

[0049] Embodiment 3: Based on the specific embodiment 2, the difference of this embodiment is that: like Figure 1 , 4As shown, a buffer rod 9 whose telescopic end contacts the inner surface of the conical screening bucket 8 is hinged at the bottom of the support frame 6. The buffer rod 9 includes a spring sleeve hinged to the support frame 6. An end cap is fixed to the end of the spring sleeve away from the support frame 6. A spring is installed in the spring sleeve. A guide rod runs through the end cap. One end of the guide rod located inside the spring sleeve is pressed against the spring. A roller in contact with the inner surface of the conical screening bucket 8 is installed at the other end of the guide rod. When the motor 7 is working, the buffer rod 9 can transmit the vibration generated by the motor 7 downward, and transmit the vibration to the conical screening bucket 8 through the contact between the roller and the conical screening bucket 8, which can improve the screening efficiency of the conical screening bucket 8 and avoid the conical screening bucket 8 from being blocked.

[0050] Embodiment 4: Based on the specific embodiment 3, the difference of this embodiment is that: like Figure 1 , 3 As shown in Figures 11, the material guide exhaust hood 3 includes a material guide hopper 301 fixedly connected and connected to the shearing cylinder 4 by bolts, an annular exhaust hood 302 covering a plurality of exhaust holes is fixed on the outer circumferential surface of the bottom of the material guide hopper 301, and an exhaust pipe 303 connected to the inner cavity of the annular exhaust hood 302 is installed along the tangential direction on the outer circumferential surface of the annular exhaust hood 302. When actually used, the exhaust pipe 303 is connected to an exhaust device externally, and a negative pressure is formed in the annular exhaust hood 302 through the exhaust device, and the air in the cylinder body 2 is sucked by the negative pressure to reduce the dust generated during the crushing process.

[0051] The above are only specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent replacements or modifications made based on the present invention to solve basically the same technical problems and achieve basically the same technical effects are all included in the protection scope of the present invention.

Claims

1. A feed crushing device for laying hens, comprising a conical material receiving base (1) and a cylinder (2) mounted on the top of the conical material receiving base (1), a material guide and exhaust hood (3) being fixed to the top of the cylinder (2) by bolts, a motor (7) being mounted on the bottom of the cylinder (2) by a support frame (6), a conical screening bucket (8) extending to the conical material receiving base (1) being fixed to the bottom of the cylinder (2), a buffer rod (9) having a telescopic end in contact with the inner surface of the conical screening bucket (8) being hinged at the bottom of the support frame (6), characterized in that: A shearing cylinder (4) and a crushing structure (5) are sequentially installed inside the cylinder body (2) and are connected from top to bottom. A rotating shaft (10) is fixed to the output shaft end of the motor (7) and passes through the crushing structure (5) and the shearing cylinder (4) from bottom to top and extends into the interior of the shearing cylinder (4). A first knife group (11) is installed on a section of the outer circumferential surface of the rotating shaft (10) located inside the shearing cylinder (4); The pulverizing structure (5) comprises an upper conical support sleeve (501) and a lower conical support sleeve (502) penetrated by a rotating shaft (10); the upper conical support sleeve (501) and the lower conical support sleeve (502) are fixed together by bolts to form a pulverizing chamber; the top of the upper conical support sleeve (501) is fixedly connected to the shearing cylinder (4) by bolts; the shearing cylinder (4) is connected to the inner cavity of the pulverizing chamber through an opening at the top of the upper conical support sleeve (501); a plurality of discharge windows connected to the inner cavity of the pulverizing chamber are provided on the conical surface of the lower conical support sleeve (502); a first screen (503) is installed in each of the plurality of discharge windows; A second knife group (504) having a diamond-shaped vertical cross section is mounted on the outer circumferential surface of one end of the rotating shaft (10) located inside the pulverizing chamber, and a pulverizing gap is left between the second knife group (504) and the inner wall of the pulverizing chamber.

2. A laying hen feed crushing device according to claim 1, characterized in that: The crushing chamber is mounted inside the cylinder (2) by means of bolts. The second knife group (504) is composed of an upper conical fixing sleeve (5041) and a lower conical fixing sleeve (5042) fixed on the rotating shaft (10). The upper conical fixing sleeve (5041) and the lower conical fixing sleeve (5042) are fixed by means of bolts to form a knife sleeve chamber. A support plate (5043) is fixed on a section of the outer circumferential surface of the rotating shaft (10) located inside the knife sleeve chamber. Conical knife pressing sleeves (5044) respectively matching the upper conical fixing sleeve (5041) and the lower conical fixing sleeve (5042) are fixed on the top and bottom of the support plate (5043). A plurality of crushing knives (5045) are penetrated along the generatrix of the conical surface on the upper conical fixing sleeve (5041) and the lower conical fixing sleeve (5042). One end of the plurality of crushing knives (5045) located inside the knife sleeve chamber is in contact with the outer circumferential surface of the conical knife pressing sleeve (5044).

3. The laying hen feed crushing device according to claim 1, characterized in that: A fine material discharge pipe (12) communicating with the inner cavity of the conical material receiving base (1) is fixed at the bottom of the conical material receiving base (1), and a qualified material discharge pipe (13) communicating with the inner cavity of the conical screening bucket (8) is fixed at the bottom of the conical screening bucket (8), wherein the discharge end of the qualified material discharge pipe (13) passes through the fine material discharge pipe (12) and extends to the outside of the fine material discharge pipe (12).

4. The laying hen feed crushing device according to claim 1, characterized in that: A load-bearing plate (201) is fixed to the top of the cylinder (2), a mounting hole (202) cooperating with the shear cylinder (4) is provided on the load-bearing plate (201), a plurality of air exhaust holes cooperating with the material guide air exhaust hood (3) are provided on the load-bearing plate (201) at equal intervals in a circular shape around the mounting hole (202), and an annular filter screen (203) is installed in the air exhaust hole; The cylinder (2) is provided with two installation grooves which penetrate the cylinder (2), and an observation glass window (204) is installed in the installation grooves.

5. The laying hen feed crushing device according to claim 4, characterized in that: The material guide exhaust hood (3) comprises a material guide hopper (301) fixedly connected and communicated with the shearing cylinder (4) by bolts, an annular exhaust hood (302) covering a plurality of exhaust holes is fixed on the outer circumferential surface of the bottom of the material guide hopper (301), and an exhaust pipe (303) communicating with the inner cavity of the annular exhaust hood (302) is installed on the outer circumferential surface of the annular exhaust hood (302) along the tangential direction.

6. The laying hen feed crushing device according to claim 1, characterized in that: The shearing cylinder (4) is composed of a straight cylinder portion (401) at the top and a conical portion (402) at the bottom. The first knife group (11) is installed in the straight cylinder portion (401) at the top of the shearing cylinder (4). The conical portion (402) at the bottom of the shearing cylinder (4) is fixedly connected to the upper conical support sleeve (501) by bolts. A vertical discharge window is provided on the cylinder wall of the straight cylinder portion (401) at the top of the shearing cylinder (4). A fan-shaped discharge window is provided on the cylinder wall of the conical portion (402) at the bottom of the shearing cylinder (4). A vertical screen (403) is installed in the vertical discharge window. A fan-shaped screen (404) is installed in the fan-shaped discharge window.

7. The laying hen feed crushing device according to claim 1, characterized in that: The buffer rod (9) comprises a spring sleeve hinged to the support frame (6), an end cap being fixed to one end of the spring sleeve away from the support frame (6), a spring being installed in the spring sleeve, a guide rod passing through the end cap, one end of the guide rod located inside the spring sleeve being pressed against the spring, and a roller being installed at the other end of the guide rod and contacting the inner surface of the conical screening bucket (8).

8. The laying hen feed crushing device according to claim 1, characterized in that: The first knife assembly (11) comprises a fixed sleeve arranged on the rotating shaft (10), and a plurality of shear knives are mounted on the outer circumferential surface of the fixed sleeve.

9. The laying hen feed crushing device according to claim 6, characterized in that: The mesh apertures of the vertical screen (403), the fan-shaped screen (404) and the first screen (503) are of the same size, and the mesh apertures of the vertical screen (403), the fan-shaped screen (404) and the first screen (503) are larger than the mesh aperture of the conical screening bucket (8).

10. The laying hen feed crushing device according to claim 1, characterized in that: The crushing knife (5045) comprises a knife bar and a mounting plate, wherein the knife bar is fixedly connected to the mounting plate, and the knife bar passes through an upper conical fixing sleeve (5041) and a lower conical fixing sleeve (5042). The upper conical fixing sleeve (5041) and the lower conical fixing sleeve (5042) are provided with knife grooves that cooperate with the knife bar. The mounting plate is fan-shaped, and a surface of the mounting plate on which the knife bar is mounted is respectively fitted with the inner surface of the upper conical fixing sleeve (5041) and the inner surface of the lower conical fixing sleeve (5042), and the other surface of the mounting plate is fitted with the outer surface of the conical knife pressing sleeve (5044).

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